I have a 3ds and a Wii u now and I'd love to know if there is any development for these apps! :D

You posted this in Console Gaming, but I'm assuming you're asking if there will be a CR app for either of these devices, so I've moved it to Site Support / Minor Questions in the Help forums, which is a better place to ask this sort of thing. It's also more likely to get an official response from CR Customer Support, since they regularly look in on the Help forums.

Where do you get off saying no when you have no proof they won't make one?

I have a wii, it's not designed for video watching

LMAO you apparently don't have YouTube or Netflix on it otherwise you would not be saying that. We are not talking about the Wii to begin with but Xbox One, PS4 & Wii U. The Wii is last gen it is not next gen.